Rennet casein and process of making the same



jan L52L873 A.A.DUNHAM RENNET CASEIN AND PROCESS OF MAKING THE SAME Filed Jan. 24, 19

A-TTORIVE Y8 Patented-Q Jan; 6, 192-521 ANDREW A DUNK-AM; on-nainnnrnennnwyonn, AssIeNoRv'm'mirnionsnrmmum:-

rAcTUR-me COMPANY, or New YORK," N-I 'Y'., a oonronnmou: on" vERM-o'wrra RENNET" oas'nrn AND" Pnocnss E1 maxmefrnn sawing,

Application neaomuaryea; i924;- s enaino essglasz i t To all whomit may concern." i I Be it-known that 1, ANDREW A, DUNHAM, v residing at; Bainbridge, Ghenango County, State ofyN'cnvYm-k, have invented aIrIIn-v- 5 provement in Rennet' Casein and-Processes-v of; Making the Same, of which {the followiirg; is a specification. Y v v My" invention has for its obje ct' thepro-wduction of rennet; casein, substantially: free from acid, fatand lactose,a-ndiinthe'form, of granules. Rennet casein, as" ordinarily" manufactured, is usedv for a number of punposes, including the coatingof paper, "as an; adhesive in themanut'acture of veneers and." the joining ofwoodwork, and as.,a ,.substitute for glue in the manufacture ofa greatmany substances such as calcimine, Wall finish, and? in the textiles, carpet, ipaperebox, 'barreljilineing, and kindred trades. Such casein-51s, however,.noti sufficiently. free from acid, .fat'; and lac-tose'to make it. suitable for food'lor; medicinal products, or for other purposes necessitating" an especiallypure casein substantiallyv; free from: such substances. It is the purpose-ofmy invention; to provide; a, process by meansof; which a rennetg'caseim of" great 7 purity may be produced, that ism: say, onesubstantially free. from; acid,fat1 and 1 lactose! light in color and! practically free from odor, and in the form of granules; without great expense. My process, comprises, generally speaking,.therltreatmentnof skim milk, vtowhicl; rennetiextract.has rbeen added, by simultaneous agitation andLheating with steam-injected directly into the fresh casein, the temperature to whichtlzie-i substancexissubjected I and the degree of agi+ tation bein such that the; casein will ,bQvOOne verted; into relatively" coarse.- granules-"and will not-coalesce and form large masses-but will remain, even after; washing and. ressring, in a. fineugranular condition an Twill; be practically freefrom acid,fat audjlactose-.= Thefollowingisan example of my-proca ess: I

5000 pounds. of skim milk'areplacedsinto a container provided with. aneagitating devicei and' means for injecting" live' steam.v The milk isheated' to" from v9 0 F. b injecting live: steamdire'ctly thereinto, an after the desired temperaturehas been: attained sufficient rennet extract is added tothicken or set th'c'mass in aeperi'od offrom five to ten minutes. The quantity ofzren-net extract used depends upon-the quality of.

, the skim milk, one. poundfofi'rennet: extract.

is," usually sufiicient for tlier'quantit .stated; but 1 preferto, addtwo, pounds of ueh: ex t tract-in: order; to imam tlie-rpro'ees I as the mills has thickened, rvs, mmef 09. diately agitate the thickenedl mass 7 form and ontinuous mannerau atjthe ametime,b y means of'live steamg I themass,gradual-1y emiss-$1 3 3; v p half an" hour;increase the -tempe' 51165:; 1570? E. Afteritli's temperatur Balsa-been; reached II discontinue agitation ,and itlre-adli tion of. further steam: andi allowi thew fiiiei. casein tosettle to. the ljQttOml ofitlie: tank. When; the" caseilrhas settl'edii' the:- whey; isdrawn ofi", Water is-g'ruzh iiitoathermiicenuntil the casein is well covered ,3 [and itliexcontents I of'tli'e; mix'eii agitatedifora about: twenty min-w utes, the: curd? being:- tlie'n t allowed? to settle and thewashew-aten drawn ofias; completely-f as possible; This washing 'operati'oni-maybbe repeated once, twice; 0r?- morei: times; ace cording to the degreexofiip uri ty of 'tliercaseini desired". The'curdtzisvthenrremovedifrom.the: vat,v pressed for a: short? time; towremov cessi vewater, i spreadi. upon,trays-1and d rierlii; in. the usual% manner,

The simultaneous. heating 'witltrdireeti steam andi agitation of. the caseinz a. curd" whi h, instead of formingza softr lumpymass, consists of substantially uni form, particles" of casein ofz aboutxthe: si-zecf'i, coarse granulated i sugar, a; condition; which; it will retain-even after washingand p -essa ing, This caseinwill be sub fromgacid, fattsand lactosev v v v As isrwell, known: to thosec.:skil'led'inzi the; art, mi1l; shows great variationsxin regard t0:-v qua1ity, ,particular1y acidity; audit it'el iS;-zj therefore, impossible? tostate a; fonmu1ai which willg1ve the.- best results witli sill? classes 0f-'milk.-.- Of" course; enough rennet shou-ldbe' used' withany givenwqua-ntity of milk. to produce a complete" coagulation ofthe casein, but. more rennet than. this may be used, .ifJdesi-red,cto hastemtheprocessof? casein formation.- Thetemperatuie wliichir I have found} best is in the. neighborhoodbf 170 R, but a' good, quality 'ofproduct may:

beobtained by' heating, at alzlower orr'higher temperature, so lon-gzyastlie heatissu-fli'cient, to prevent the'particles; from coalescing when they: settle to the bott'oniofthe vat, andiis not so high as to cook thecasein into a solidmassf When in my claimI' speak of 1 St n-ethy free; 90b

- to scale.

a temperature ofapproximately 170 F. I intendto cover the rangeindicated as an equivalent thereof.

In order todisclose my process as fullyas possible-I show in the accompanying drawmg a'container equipped for the operation of my process, the parts being shown drawn In such drawing A represents a round container; provided with a vertical shaft B carrying paddles or agitators C. Suitable'means are provided for rotating the'shaftfB, for instance bevel gear wheels 1 s ed 1), D "and associated driving shaft G, pulleyfI I and bearings I. A steam pipe E passing 'throu h the shell A is provided with a rfora end piece F for the purpose of injecting steam directly into the milk in thefform preferably of fine sprays or jets.

If a round container, havingithe proportions showfni'n. the drawing be built with eight feet interior diameter and four feet interior height vi tvwill be found suitable for working 5000 lpounds of skim milk according to the I c' I example hereinabove given. resultswill be obtained if the vertical shaft B is equipped with two sets of paddles of my blades each, one set of paddles very close to the bottom and the other set about eighteen inches above the bottom, both paddles, running in the same direction and at a rate of about 60 R. P. M. If pipe E, with its perforated end piece 'F is placed as shown in the drawing, it will be always below the level of the liquid within the container, a condition which will prevent burning of the solids in the milk with resultant contamination of the scorched particles.

I claim:

The process of treating. rennet casein for the purpose of removing therefrernsubstantially all of its acidjdiat and lactose content, which comprises agitating the same in the presence of water while gradually heating "to aitemperature of approximately 170 F.,-by the means of steaminjected directly thereinto, for'such alength of time that thef'resulting product is brought into end product by the form of coarse granules, substantially as and for the purpose described. In testimony whereof I have hereunto set my hand.

ANDREWQA. DUNHAM. 

